Input PowerShell Tutorial - ELTE

[Pages:36]PowerShell Tutorial

Erik Hjelm?s

Variables

Arrays Structures/Classes Command-line args

Input

Input System commands

Conditions

if/else Operators Switch/case Where

Iteration

For While Foreach

Math

Functions

RegExp

PowerShell example

PowerShell only

Credits

PowerShell Tutorial

Erik Hjelm?s March 22, 2011

PowerShell Tutorial

Erik Hjelm?s

Variables

Arrays Structures/Classes Command-line args

Input

Input System commands

Conditions

if/else Operators Switch/case Where

Iteration

For While Foreach

Math

Functions

RegExp

PowerShell example

PowerShell only

Credits

(OUSTERHOUT, J., "Scripting: Higher-Level Programming for the 21st Century", IEEE Computer, Vol. 31, No. 3, March 1998, pp. 23-30.)

PowerShell Tutorial

Erik Hjelm?s

Variables

Arrays Structures/Classes Command-line args

Input

Input System commands

Conditions

if/else Operators Switch/case Where

Iteration

For While Foreach

Math

Functions

RegExp

PowerShell example

PowerShell only

Credits

WARNING!

The following presentation is NOT meant to be a comprehensive/complete tour of the PowerShell language. The purpose is to get you started with some basic program constructions which you will recognize based on some-sort-of-programming-background. At the end of the presentation (Credits section) you will find pointers to more comprehensive material (reference material).

PowerShell Tutorial

Erik Hjelm?s

Variables

Arrays Structures/Classes Command-line args

Input

Input System commands

Conditions

if/else Operators Switch/case Where

Iteration

For While Foreach

Math

Functions

RegExp

PowerShell example

PowerShell only

Credits

Practice

You need a Windows host running on a physical or virtual machine with working access to the internet, and with PowerShell v2.0 installed. Log in and open a terminal window, download the examples as we go along from

http :// www . hig . no /~ erikh / tutorial-powershell / FILENAME

(or download all at once with filename powershell-examples.zip but remember to unblock before unzip)

PowerShell Tutorial

Erik Hjelm?s

Variables

Arrays Structures/Classes Command-line args

Input

Input System commands

Conditions

if/else Operators Switch/case Where

Iteration

For While Foreach

Math

Functions

RegExp

PowerShell example

PowerShell only

Credits

Hello World

# hello.ps1 Write-Host "hello world!"

execute as long as filename ends with .ps1:

.\ hello . ps1

or direct from command line cmd (DOSPROMPT)

powershell -command "Write-Host \"hello world!\""

or direct from command line powershell

Write-Host "hello world!"

PowerShell Tutorial

Erik Hjelm?s

Variables

Arrays Structures/Classes Command-line args

Input

Input System commands

Conditions

if/else Operators Switch/case Where

Iteration

For While Foreach

Math

Functions

RegExp

PowerShell example

PowerShell only

Credits

Single Variables

# single-var.ps1 $firstname="Mysil" $lastname="Bergsprekken" $fullname="$firstname $lastname" Write-Host "Hello $fullname , may I call you

$firstname ?"

All variables are prefixed with $

PowerShell Tutorial

Erik Hjelm?s

Variables

Arrays Structures/Classes Command-line args

Input

Input System commands

Conditions

if/else Operators Switch/case Where

Iteration

For While Foreach

Math

Functions

RegExp

PowerShell example

PowerShell only

Credits

Single and Double Quotes

# quotes.ps1

$name="Mysil" Write-Host Hello Write-Host "Hello Write-Host Hello

$name $name" $name

PowerShell Tutorial

Erik Hjelm?s

Variables

Arrays Structures/Classes Command-line args

Input

Input System commands

Conditions

if/else Operators Switch/case Where

Iteration

For While Foreach

Math

Functions

RegExp

PowerShell example

PowerShell only

Credits

Arrays

One-dimensional arrays:

# array.ps1

$os=@("linux", "windows")

$os += @(" mac ")

Write-Host $os[1]

# print windows

Write-Host $os

# print entire array

Write-Host $os.Count # length of array

Arrays are created with @(...)

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